著者

Baofeng SU Noboru NOGUCHI

出版者

日本生物環境工学会

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.50, no.3, pp.277-287, 2012 (Released:2012-10-30)

参考文献数

19

被引用文献数

1 3

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The availability of agricultural land use information allows decision makers and managers to establish short-term and to long-term plans for land conservation and sustainable use. The objective of this study was to develop a method for extraction of agricultural land use information based on remote sensing imagery. By combining particle swarm optimization (PSO), k-means clustering algorithm and minimum distance classifier, a PSO-k-means-based minimum distance classifier for agricultural land use classification was developed. Crop planting information was collected and divided into five classes: water bodies, paddy fields, bean fields, wheat fields and others (windbreak, roads, rare areas, and buildings, etc.). K-means, a widely used algorithm in pattern recognition for unsupervised classification, became a part of supervised classification by using PSO to find the optimal initial position vectors in a training sample pretreatment process. The optimal cluster of each subclass was finally used for minimum distance classification. The results obtained from Miyajimanuma wetland land use information extraction showed that merely using a small feature space composed of the first three principal components of a SPOT 5 image enabled classification accuracy of 93%.

著者

Satoshi YAMAMOTO Shigehiko HAYASHI Shogo TSUBOTA

出版者

日本生物環境工学会

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.53, no.2, pp.49-53, 2015 (Released:2015-06-17)

参考文献数

7

被引用文献数

8

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The movable bench cultivation system is a method of increasing area productivity and minimizing the energy needed in a greenhouse. In the system, all plants pass through the same watering point every day. This point should thus be the ideal place to measure precise plant growth information. In this study, we construct an experimental system for a 3D measurement of a community of strawberries cultivated on a 1-meter-long bench. The measurement was made every two to seven days from October 23, 2013 to January 13, 2014. As a result, we obtained 31 images of 10 plant beds. The estimation error of maximum plant height ranged from −30 mm to 32 mm, and that of width ranged from −42 mm to 40 mm. To visualize the growth information effectively, a 2D histogram of the distribution of the 3D points of the plant community was also calculated.

著者

Masanori TAMAOKI Tohru YABE Jun FURUKAWA Mirai WATANABE Kosuke IKEDA Izumi YASUTANI Toru NISHIZAWA

出版者

日本生物環境工学会

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.54, no.1, pp.65-69, 2016 (Released:2016-01-29)

参考文献数

24

被引用文献数

10

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Sixteen plant species were tested for their potential to remove radioactive cesium from contaminated soil with the Fukushima Daiichi nuclear disaster. There was a large difference of transfer factor (TF) of radiocesium (137Cs) from the soil to plants. Among the examined plants, Hollyhock belonging to Malvaceae showed the highest TF but the efficiency of phytoremediation, such as total 137Cs absorption of a plant or 137Cs removal from unit area, was not proportionally high. According to the evaluation criteria (uptake of 137Cs per plant and/or area), Kochia was shown to be the best plant species among 16 plants investigated here. Analysis of correlation showed that there was positive relationship between the total 137Cs absorption and plant biomass, and contribution rate of plant biomass in total 137Cs uptake by plant was scored to be 91.3%. These results indicate that selection of plant species that shows high biomass on site is important for 137Cs-targeted phytoremediation rather than the plants’ ability in 137Cs-uptake. On the other hand, our results also suggested that the TF value should be considered in order to evaluate the plant ability for 137Cs-targeted phytoremediation. From this point of view, the present study suggests that field-grown Kochia could be used as a potential candidate plant for phytoremediation of 137Cs from soil.

著者

Kaito MASUDA Tomoya UI Ayumi HIRAOKA Hiroshi NAKASHIMA Juro MIYASAKA Katsuaki OHDOI Ryozo NOGUCHI

出版者

Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.61, no.2, pp.17-28, 2023-04-01 (Released:2023-05-03)

参考文献数

30

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To investigate the effects of different types of irradiation on the growth and morphological characteristics of leaf lettuce (Lactuca sativa L. var. crispa “Greenwave”), a quantitative analysis of the leaf contour using an elliptic Fourier descriptor (EFD) was carried out together with conventional measurement methods. Two experiments were conducted to test the different treatments. Experiment 1 investigated the effects of monochromatic/alternating/simultaneous red/blue irradiation, and Experiment 2 determined the effects of random variations in photosynthetic photon flux density (PPFD) compared with that of constant light. The growth and morphological characteristics in Experiment 1 were consistent with those of previous studies, where the shoot fresh weights in monochromatic and alternating irradiations were larger than those in simultaneous irradiations. EFD showed that the leaf length and petiole under monochromatic and alternating irradiation were longer and more apparent than those under simultaneous irradiation. In Experiment 2, both the conventional measurement methods and EFD could hardly detect any differences in leaf lettuce growth and morphological characteristics under constant PPFD. These results suggested that fluctuating PPFD within certain limits in a PFAL may have little effect on the leaf lettuce growth.

著者

Leila MOHAMMADI Hamed HASSANZADEH KHANKAHDANI Fumina TANAKA Fumihiko TANAKA

出版者

Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.59, no.2, pp.87-98, 2021-04-01 (Released:2021-04-29)

参考文献数

52

被引用文献数

14

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Short postharvest life of button mushroom (Agaricus bisporus L.) is a serious problem in the expansion of marketing and long-distance transportation of this product. Edible coating is an effective way to delay the browning process and mitigate the deterioration of button mushroom. In this study, the impact of Aloe vera gel alone and combined with basil oil as an edible coating on postharvest quality and browning of mushroom has been investigated. Surface morphology of the coated and uncoated mushrooms was studied by scanning electron microscopy (SEM). The results indicated that application of A. vera gel enriched with basil oil significantly alleviated weight loss, softening and respiration rate during the storage. In addition, coated samples delayed browning and color change compared to uncoated samples. Interestingly, total phenolic contents, antioxidant and phenylalanine ammonia lyase activity increased in samples coated by treatment of A. vera and basil oil. Relative electrolyte leakage, malondialdehyde content and polyphenol oxidase activity were also significantly lower in A. vera enriched with basil oil treated samples. These findings suggest that combination of A. vera with basil oil is a promising method to preserve the quality of the button mushrooms during cold storage.

著者

Ken-ichiro YASUBA Hidehito KUROSAKI Takehiko HOSHI Takashi OKAYASU Yoshiyuki TANAKA Tanjuro GOTO Yuichi YOSHIDA

出版者

Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.56, no.3, pp.107-112, 2018 (Released:2018-07-20)

参考文献数

17

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A program library for use on open-source hardware was developed in order to construct a low-cost environmental control system for greenhouses. The library facilitated the development of environmental sensing and control devices that conform to the protocols of the Ubiquitous Environment Control System (UECS). The open-source hardware used was the "Arduino Ethernet" and the "Arduino Mega 2560 with Ethernet Shield" microcontroller boards. UECS is a system for controlling greenhouse environments that communicates information via a local area network, and devices utilizing the library that we developed can perform the UECS defined communication tasks automatically. With the help of this library, device developers no longer need to program the communications aspects of the device and can concentrate on programming setting and control logic of the device. The library occupies about 29 kilobytes of the read only memory area of the target board. The library and associated open-source microcontroller boards are powerful tools for developing low-cost environmental control systems.

著者

Hiroshi SHIMIZU Takayuki HOSHI Kenji NAKAMURA Jai-Eok PARK

出版者

日本生物環境工学会

雑誌

Environmental Control in Biology (ISSN:1880554X)

巻号頁・発行日

vol.53, no.2, pp.85-88, 2015 (Released:2015-06-17)

参考文献数

9

被引用文献数

4

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An ultrasonic pollination device was developed to achieve effective artificial pollination of strawberries in artificial light type plant factories. A phase array of hundreds of ultrasonic transducers was appropriately controlled and focused on one point in space, and it is possible to generate a force at any position in space. The force was modulated at 30 Hz which is the characteristic frequency of strawberry flower. The pollination experiment was conducted using the strawberry variety F1 Elan (Fragaria×ananassa). The total weight of the strawberries harvested over 22 days was 1.22 kg, and the average weights of individual strawberry fruits were 9.1 g.